| commit | 4e0d25fd335ded4e69323a5355504798a6723399 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Sat, 9 Sep 2017 22:59:25 +0000 (9 15:59 -0700) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Sat, 9 Sep 2017 22:59:25 +0000 (9 15:59 -0700) | ||
| tree | fb8d5a2e36805ed3e2a9c8e170e2b0e1067919e5 | treesnapshot (tar.gz zip) |
| parent | 6e4c95df86b26f7ac4d8fa696c7b516e7dcff510 | commitdiff |
hammer2 - Track leaf counts for topological collapse
* Track leaf counts through indirect blocks. This is a prereq to
being able to efficiently collapse indirect nodes that have become
too empty to be useful.
* Leaf count is capped at 65535. Attempting to decrement the count will
flag the chain to recount (in a later commit).
* Because this count will be used to determine when a collapse is possible,
we do not track leaf counts through inodes. That is, an inode counts as
a leaf.
* Track leaf counts through indirect blocks. This is a prereq to
being able to efficiently collapse indirect nodes that have become
too empty to be useful.
* Leaf count is capped at 65535. Attempting to decrement the count will
flag the chain to recount (in a later commit).
* Because this count will be used to determine when a collapse is possible,
we do not track leaf counts through inodes. That is, an inode counts as
a leaf.
| sbin/hammer2/cmd_debug.c | diffblobblamehistory | |
| sys/vfs/hammer2/hammer2.h | diffblobblamehistory | |
| sys/vfs/hammer2/hammer2_chain.c | diffblobblamehistory | |
| sys/vfs/hammer2/hammer2_disk.h | diffblobblamehistory |